Harvest source change: FERC DCAT US 3 Harvest Source

NEW HARVEST SOURCE - EASY ADD (NO CHANGE)

Private or internal request details should not be included in this public issue.

## Description & Requested Outcome

We need to create or update a Metadata Harvest Source in the harvesting system under the appropriate parent organization once all required prerequisites are met.

This request may be related to information collected through an internal intake process. Do not include private survey responses, internal-only details, or non-public links in this public issue.
Touchpoints form location:
* Internal Link: https://touchpoints.app.cloud.gov/admin/forms/ffb7e9d0
* Public Link: https://touchpoints.app.cloud.gov/touchpoints/ffb7e9d0
Internal GSA Google Drive for form printouts: https://drive.google.com/drive/folders/1XJnjv9kfeBMq_CZaj4y1ACDEtkokPq3e?usp=drive_link

## Parent organization

Organization: FERC

No public file, test, or code entry point is named. Start by reviewing the harvesting system's existing source-creation workflow and confirm the required prerequisites for the FERC parent organization. Done means the FERC DCAT US 3 source is created or updated with all required public details and can be processed by the harvesting system.

Written by the indexing model from the issue text.